WiFi Direct

Jeff Bondy

Other Parts Discussed in Thread: CC3200

Hi,

I'm running the P2P application on the CC3200 with no results. I am using the android SDK example (http://developer.android.com/training/connect-devices-wirelessly/wifi-direct.html import from the SDK in Android Studio or Eclipse). To reproduce:

Turn off wifi on Nexus 3 or 5
Turn on wifi
Run Android WiFi Direct application and begin search
run p2p application on CC3200
After terminal attached to CC3200 shows "Connect to cc3200-p2p-device"
In p2p application the STATUS_BIT_P2P_DEV_FOUND goes true
shows up as Peer under Android application
Hit connect on the Android device
Everything hangs here

The simple link layer never sets the STATUS_BIT_P2P_REQ_RECEIVED.

Does anyone have a list of devices that the p2p program proved stable on? Can anyone provide more information on debugging the P2P portion using a debuggable Android platform?

Thanks,

over 9 years ago

0 Ankur Baranwal over 9 years ago

TI__Mastermind 26155 points

Hi Jeff,

I just tried the SDK application multiple times with a nexus 4 mobile and was successfully able to connect every time.

When you initiate the connection from the android side application should receive 'SL_WLAN_P2P_NEG_REQ_RECEIVED_EVENT' event.

Can you check if this event is getting triggered?

Where exactly the application is stuck? Can you pause and check?

Regards,

Ankur

0 Jeff Bondy over 9 years ago in reply to Ankur Baranwal

Prodigy 110 points

It stops waiting at:

line 556 of main.c in the WlanConnect() function:

while (!IS_P2P_REQ_RCVD(g_ulStatus)) {

0 Ankur Baranwal over 9 years ago in reply to Jeff Bondy

TI__Mastermind 26155 points

Can you try connecting using the in build wifi direct feature of you mobile (option available under settings)?

Regards,

Ankur

0 Jeff Bondy over 9 years ago in reply to Ankur Baranwal

Prodigy 110 points

Hi Ankur,

I have with the Nexus 5 and 3 with the same negative results. I went with the Android sample app so I could get to debug. On device detection I get all the information I expect:

DeviceName: cc3200-p2p-device

Device Address: 78:XX:XX:XX:XX:XX:XX

Lots of ancillary info too . . .

The CC3200 never comes back with negotiation though. What can I look for in the CC3200 p2p application to debug the connection negotiation? Is there a P2P setup (whether it's client/master . . .) that might solve the problem? Are there any suggestions that TI could give that would debug this. I appreciate that a lot of time has gone into making these sample applications just work.

Can a non-TI employee give a suggestion of a device that the p2p application worked with and if there are any quirks like timing?

Thanks,

jeff

0 Ankur Baranwal over 9 years ago in reply to Jeff Bondy

TI__Mastermind 26155 points

Hi Jeff,

Can you try making the following change in code? This will initiate the connection request from the CC3200 side without waiting for mobile to initiate.

Inside function definition WlanConnect()

Before:

    SlSecParams_t secParams = {0};
    long lRetVal = 0;

    secParams.Key = (signed char *)P2P_SECURITY_KEY;
    secParams.KeyLen = strlen(P2P_SECURITY_KEY);
    secParams.Type = P2P_SECURITY_TYPE;

    lRetVal = sl_WlanConnect((signed char *)P2P_REMOTE_DEVICE,
                            strlen((const char *)P2P_REMOTE_DEVICE), 0,
                            &secParams, 0);
    ASSERT_ON_ERROR(lRetVal);

    // Wait till Device acquired an IP in P2P mode
    while(! IS_P2P_REQ_RCVD(g_ulStatus))
    { 
        _SlNonOsMainLoopTask();
    }

    // Connect with the device requesting the connection
    lRetVal = sl_WlanConnect((signed char *)g_p2p_dev,
                           strlen((const char *)g_p2p_dev),
                           0, &secParams, 0);
    ASSERT_ON_ERROR(lRetVal);
    
#ifdef P2P_ROLE_TYPE_NEGOTIATE
    while(! IS_IP_ACQUIRED(g_ulStatus))
#else
    while(! IS_IP_LEASED(g_ulStatus))
#endif
    {
        _SlNonOsMainLoopTask();
        if(IS_CONNECT_FAILED(g_ulStatus))
        {
            // Error, connection is failed
            ASSERT_ON_ERROR(NETWORK_CONNECTION_FAILED);
        }
    }

After:

    SlSecParams_t secParams = {0};
    long lRetVal = 0;

    secParams.Key = (signed char *)P2P_SECURITY_KEY;
    secParams.KeyLen = strlen(P2P_SECURITY_KEY);
    secParams.Type = P2P_SECURITY_TYPE;

    lRetVal = sl_WlanConnect((signed char *)<your mobile device name>,
                            strlen((const char *)<your mobile device name>), 0,
                            &secParams, 0);
    ASSERT_ON_ERROR(lRetVal);
  
#ifdef P2P_ROLE_TYPE_NEGOTIATE
    while(! IS_IP_ACQUIRED(g_ulStatus))
#else
    while(! IS_IP_LEASED(g_ulStatus))
#endif
    {
        _SlNonOsMainLoopTask();
        if(IS_CONNECT_FAILED(g_ulStatus))
        {
            // Error, connection is failed
            ASSERT_ON_ERROR(NETWORK_CONNECTION_FAILED);
        }
    }

The role and policy is configured in function P2PConfiguration(). Please refer to application note available under '<cc3200-sdk>/docs/examples/' for details on different possible values.

You can also try the any_p2p connection policy.

Regards,

Ankur

0 Jeff Bondy over 9 years ago in reply to Ankur Baranwal

Prodigy 110 points

Hi Ankur,

That did get it hooked up thanks! I will go through the changes to make sure I understand what they are.

Thanks again,

Jeff

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